Keylogger records changes in text input fields. The Accessibility Service «Keylogger» must be activated so that the app works. Activation works similarly, as in Android Spy. Here is a tutorial on how to proceed. Please note, that Keylogger doesn't record passwords in password input fields. This app can be used for free.
Required Android version: 4.0 or higher
This Application stores changes in text input fields. Only the user of the mobile phone has access on this data.